Pulmonary hypertension (PH) is a devastating disease caused by different etiology and characterized by the progressive elevation of pulmonary vascular resistance and pulmonary artery pressure. As a new method that applied to clinical studies, computational fluid dynamics (CFD) gradually becomes a powerful tool for in-depth understanding the diseases progression. It can noninvasively obtain the patient-specific hemodynamic parameters at any point of the vessel and present them through the visualization technology. In the present work, we provide an overall review of CFD with a focus on PH, including the numerical simulation methods, boundary conditions, blood characteristics and relevant hemodynamic parameters.